Platelets and Fibrin (image) University of California - Riverside Share Print E-Mail Caption Contracting platelets (green) cause bending, kinking, and local accumulation of fibrin fibers (red) resulting in dramatic remodeling of the fibrin matrix. Credit UC Riverside. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.